Redwood City, CA Climate: Temperature & Rain by Month
Pulled from NOAA NCEI 1991–2020 normals →: climate measurements used in PlainClimate's documented score
30-year climate normals (1991-2020) from Redwood City's primary NOAA station, REDWOOD CITY.
The climate verdict for Redwood City
Dryness leads the climate profile for Redwood City, California, with 19.0 inches of precipitation a year. NOAA records an annual average of 59°F. It scores 80/100 for climate comfort (excellent), putting it in the top third of station-mapped location scores and exceeding 76% of them.
- 59°F
- yearly average temperature, NOAA normal
- 80/100
- comfort score, above 76% of station-mapped location scores
- 19.0"
- annual precipitation
- 329 days
- frost-free growing season
Redwood City: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00047339 · Redwood City, CA 59°F mean · 19.0" precip
TEMP-MILD · RANK-UPPER · PHOTO-FINISH · PRCP-DRY · SWING-NARROW · COMF-TOP · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-MILD 59°F
- RANK-UPPER #5,009
- PHOTO-FINISH ≈ San Rafael Civi…
- PRCP-DRY 19.0"
- SWING-NARROW 19°F
- COMF-TOP 80/100
- LOAD-HEAT 2,519 HDD
- STN-1 USC00047339
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: San Rafael Civic Ctr, CA (+ 0.1 °F mean)
Instrument codes from this station's NOAA 1991–2020 normals, mean temperature, corpus warmth rank, photo-finish peer station, precipitation band, seasonal swing, comfort composite, degree-day load, and field book, not a livability rating.
Mean-temperature neighbourhood
Nationwide NOAA normal poles and nearest peers, not a reprint of every CA station list.
- Hot Los Gatos, CA 60°F
- Near San Rafael Civi…, CA 60°F
- Redwood City (this station) 59°F
- Cold Santa Rosa, CA 59°F
- Near Kentfield, CA 59°F
Climate Living Index · Redwood City
Redwood City: 81/100 · grade B
Redwood City publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Redwood City, not an official NOAA rating. Rankings still use Comfort Score 80/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Frost-free season | 329 days/year | 100/100 · A |
| Normal heat + freeze calendar | 0 calendar days | 100/100 · A |
| Snowfall burden | 0.0 inches/year | 90/100 · A |
| Annual temperature balance | 59.4°F · 8.1° from 67.5°F | 74/100 · B |
| Precipitation balance | 19.0 in · 16.0 from 35 in | 43/100 · D |
Redwood City · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Redwood City is a temperate Köppen climate: Csb
Coldest-month mean 49.4°F and warmest-month mean 68.8°F place this station in temperate, dry-summer, warm summer climates (Csb). Class Csb is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: temperate, specifically temperate, dry-summer, warm summer.
- Köppen code
- Csb
- Group
- Temperate
- Warmest month
- 68.8°F
- Coldest month
- 49.4°F
Source: official public datasets monthly normals (1991–2020) at the city’s primary station. This is a station classification, not a mapped regional consensus.
National standing · heating-led station
Where Redwood City sits across the climate record
Three NOAA fields for Redwood City's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Top 27% warmest
- Among 6,861 stations, Redwood City sits in the warmer third of annual means.
- Annual precipitation
- Drier than 74%
- Redwood City's annual total ranks in the drier third of 6,352 measured normals.
- Seasonal temperature swing
- Narrower than 97%
- Warmest-to-coldest month gap for Redwood City is compact versus 6,861 complete station-years.
How Redwood City compares across U.S. station-mapped locations
Redwood City's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
80 Top 24% score exceeds 76% of 6,189 station-mapped location scores
- 0–10: 0 station-mapped locations (0%). Below this entry.
- 10–20: 0 station-mapped locations (0%). Below this entry.
- 20–30: 96 station-mapped locations (2%). Below this entry.
- 30–40: 280 station-mapped locations (5%). Below this entry.
- 40–50: 1,113 station-mapped locations (18%). Below this entry.
- 50–60: 1,329 station-mapped locations (21%). Below this entry.
- 60–70: 1,236 station-mapped locations (20%). Below this entry.
- 70–80: 650 station-mapped locations (11%). Below this entry.
- 80–90: 921 station-mapped locations (15%). This entry sits in this band.
- 90–100: 564 station-mapped locations (9%). Above this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Redwood City's measured station temperature trend
MethodologyAcross 75 complete annual observations from 1931 to 2025, REDWOOD CITY warmed at a fitted rate of 0.17°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Redwood City primary station fitted change +0.17 °C/decade
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 59°F (15°C) | 41°F (5°C) | 50°F (10°C) | 3.8" | 0.0" | 2.5 | 0.0 |
| February | 62°F (17°C) | 43°F (6°C) | 52°F (11°C) | 3.6" | 0.0" | 0.7 | 0.0 |
| March | 65°F (19°C) | 45°F (7°C) | 55°F (13°C) | 3.0" | 0.0" | 0.0 | 0.0 |
| April | 69°F (20°C) | 47°F (8°C) | 58°F (14°C) | 1.1" | 0.0" | 0.0 | 0.3 |
| May | 73°F (23°C) | 50°F (10°C) | 62°F (16°C) | 0.5" | 0.0" | 0.0 | 1.2 |
| June | 79°F (26°C) | 54°F (12°C) | 66°F (19°C) | 0.2" | 0.0" | 0.0 | 3.6 |
| July | 81°F (27°C) | 57°F (14°C) | 69°F (20°C) | 0.0" | 0.0" | 0.0 | 3.6 |
| August | 81°F (27°C) | 57°F (14°C) | 69°F (20°C) | 0.0" | 0.0" | 0.0 | 3.8 |
| September | 79°F (26°C) | 54°F (12°C) | 67°F (19°C) | 0.1" | 0.0" | 0.0 | 4.2 |
| October | 75°F (24°C) | 50°F (10°C) | 62°F (17°C) | 0.9" | 0.0" | 0.0 | 1.5 |
| November | 65°F (18°C) | 44°F (7°C) | 54°F (12°C) | 1.9" | 0.0" | 0.4 | 0.0 |
| December | 59°F (15°C) | 40°F (5°C) | 49°F (10°C) | 3.9" | 0.0" | 2.6 | 0.0 |
The year, day by day
The calendar barely moves in Redwood City: no date carries a normal high of 90°F or a normal low at freezing. The year runs between 40°F near December 23 and 81°F near July 8.
No freezing date
Not one calendar date in the 1991–2020 record carries a normal low at or below 32°F. The coldest normal low of the year is 40°F around December 23.
Where the wet dates fall
The likeliest wet date is February 27, when 33% of years recorded at least a hundredth of an inch. The driest is July 22 at 0%. Summed across the calendar, that is about 56 wet dates a year.
The widest day
June 23 carries the biggest normal gap between afternoon and dawn, 26°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Redwood City.
Monthly Precipitation
Average monthly rainfall and snowfall
9.3 days with precipitation
9.1 days with precipitation
9.4 days with precipitation
4.9 days with precipitation
2.9 days with precipitation
0.9 days with precipitation
0.0 days with precipitation
0.2 days with precipitation
0.5 days with precipitation
2.5 days with precipitation
6.3 days with precipitation
9.3 days with precipitation
Redwood City's wet season runs through the cold months
December, January and February carry 60% of the year's precipitation here, while June through August contribute 1%. That is the cool-season-dominant pattern of the West Coast and the higher inland West, where storm tracks swing south in winter and summer turns dry; the thermometer meanwhile shows an unusually narrow 19.4°F seasonal spread.
- Wettest month
- December, 3.9"
- Driest month
- July, 0.0"
- Wettest three months
- December, January, February (60% of the year)
Shares are computed from this station's own 1991-2020 monthly precipitation normals. A cool-season label means the December-February share reaches 35%. Where snow falls, the monthly figures above report liquid-equivalent precipitation, so a wet winter month is not necessarily a rainy one.
How Redwood City's precipitation splits across the calendar
About 55 days a year record measurable precipitation here, carrying 19.0" between them, or roughly 0.34 inches on a typical wet day. That sits in the middle band: neither the many-light-days pattern of the Pacific Northwest and the Great Lakes, nor the few-heavy-events pattern of the Gulf and the desert Southwest.
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year and say nothing about the heaviest single storm on record.
Redwood City's record shows no measurable snowfall
This station measured snowfall across the 1991-2020 period and recorded none: the annual normal is 0.0 inches. That is a measured zero rather than missing data, which is a meaningful distinction here , most stations in the database simply do not report snow at all, and those pages say nothing about it.
A thirty-year normal of zero describes the typical year at this station. It is not a claim that snow has never fallen in the area.
Frost Dates & Growing Season
First Fall Freeze
December 12
50% probability date
Last Spring Freeze
January 17
50% probability date
Growing Season
329 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
2,519
Higher = more heating needed
Cooling Degree Days
475
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
Nationwide similar cities
Other rankable U.S. places outside CA closest to Redwood City on two NOAA annual-normal axes (mean temperature and annual precipitation). Chip rows use distinct link sets.
Closest by average temperature
Nearest out-of-state peers by annual mean temperature (59°F here).
- Levelland, TX 59°F · 0.0°F off
- Morton, TX 59°F · 0.0°F off
- Red Rock, OK 59°F · 0.0°F off
- Siler City, NC 59°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (19.0" here), excluding temperature-peer places.
- Olton, TX 19.0" · 0.0" off
- Hazelton, ND 19.0" · 0.0" off
- Bismarck, ND 19.1" · 0.0" off
- Denver City, TX 19.1" · 0.0" off
Data-derived climate profile
How Redwood City's climate pattern fits together
heating led · dry · low swing
Heating is the larger measured load in Redwood City, at 2,519 degree days versus 475 for cooling. Unlike a strongly continental record, however, its 19.4°F month-to-month range is compact; persistent cool-season demand matters more than a dramatic summer-to-winter reversal.
Redwood City has a long frost-free window of roughly 329 days, but the dry annual profile is a separate constraint. Growing-season length says when freezes are unlikely, not whether rainfall is sufficient.
The calendar stays thermally compact and dry. July and December mark the typical warm and cold ends of the calendar, only 19.4°F apart, while the annual precipitation total remains below PlainClimate's dry threshold. The annual average is 59°F. The monthly rows show whether that limited precipitation is spread through the year or concentrated in a shorter interval.
Redwood City's cold-season load does not imply a wet climate. Annual precipitation is 19.0 inches, which places the station in PlainClimate's dry range. Recorded annual snowfall is negligible. The snowfall and rainfall fields should be read separately rather than inferred from temperature.
These labels group NOAA 1991-2020 normals from Redwood City's primary station, so the winter figures are a thirty-year average and not a floor: a single hard season can run well below them. Treat each band as a descriptive range for Redwood City, not an official NOAA class or a year-ahead forecast.
Questions about Redwood City's climate
How much rain does Redwood City get? ▼
How much energy does heating and cooling require in Redwood City? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Redwood City's primary station: REDWOOD CITY (USC00047339). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The 2024 Census Gazetteer identifies the exact name-and-state match as an incorporated place (GEOID 0660102). Match rule for Redwood City: exact normalized name + state only, no fuzzy expansion, so nearby differently spelled facilities stay unmatched.
On this page every temperature, precipitation, and derived score for Redwood City comes from its primary NOAA station record. No figure on this page is typed in by an editor - each value is rendered from NOAA 1991-2020 U.S. Climate Normals. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 1991–2020 normals.